Search results
Results from the WOW.Com Content Network
The placement consisted of 10,251 cubic yards of concrete placed in 58.5 hours using two concrete pumps and two dedicated concrete batch plants. Upon curing, this placement allows the 50,180-square-foot (4,662 m 2 ) cofferdam to be dewatered approximately 26 feet (7.9 m) below sea level to allow the construction of the Inner Harbor Navigation ...
[citation needed] In the concrete and petroleum industry, however, a bag of cement is defined as 94 lb (43 kg) because it has an apparent volume close to 1 cubic foot (28 litres). [61] When ready-mix concrete is specified, a "bag mix" unit is used as if the batching company mixes 5 literal bags of cement per cubic yard (or cubic metre) when a ...
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
The most common use for portland cement is in the production of concrete. [17] Concrete is a composite material consisting of aggregate (gravel and sand), cement, and water. As a construction material, concrete can be cast in almost any shape desired, and once hardened, can become a structural (load bearing) element.
A total of 71 short tons (64 t) of steel reinforcing rods were used in the roof, which contained 953 cubic yards (729 m 3) of concrete. [79] The roof was 74.75 feet (22.78 m) wide and 110 feet (34 m) long—reportedly the largest concrete roof in the world at the time. [64] [71] [79] The roof was supported by four steel-reinforced concrete ...
Trump Tower used 45,000 cubic yards (34,000 m 3) of concrete and 3,800 tons of steelwork. [26] The use of a concrete superstructure was in contrast to many other skyscrapers, which were built on steel frames. Scutt said a concrete frame was easier to build and was more rigid than a steel frame was. [27]
The PT Mix was used in both the 10-pound M74 bombs dropped in clusters and the 500-pound M76 bomb in both theaters of the War. The March 9–10, 1945, firebombing of Tokyo, utilizing the M69 bomb, loaded with napalm, killed more than 80,000 people.
Twin electric pumps pushed concrete through the pipe at 3,000 pounds (1,400 kg) per 1-square-inch (6.5 cm 2). The pipe could pour 60 to 65 cubic yards (46 to 50 m 3 ) of concrete per hour. [ 120 ] Metal cables running through the still-liquid concrete were vibrated to ensure a flush fit against previously poured concrete and to eliminate voids.